INFOBOX: The commercial space market in the U.S. began in much the same way. In 2006, when it became clear that the Space Shuttle would retire in a few years, NASA and the U.S. government launched the Commercial Orbital Transportations Service (COTS) program to ensure availability of commercial, U.S.-based transportation options after Shuttle retirement in 2013. A clear step away from institutionally developed launch systems by NASA, towards the procurement of commercial transportation services. Over the next several years, the program itself evolved into a competition of sorts. In several steps and milestones, different companies received funding (which increased with each step), and the program was divided into several subprograms, such as for ISS resupply, crew transportation, and even lunar missions. The programs have also been extended several times.
